Epidemiological evaluation of traumatic lower limb fractures in children: Variation with age, gender, time, and etiology.

To investigate the age, gender, time, and etiology differences of traumatic lower limb fractures (TLLFs) in a population of children (≤18 years old), we retrospectively reviewed 936 children who had TLLFs and who came to our university-affiliated hospitals from 2001 to 2010. This study enrolled 657 males (70.2%) and 279 females (29.8%) aged (11.6 ± 4.9) years old. The most common etiologies and fracture sites were motor vehicle collisions (MVCs, 440, 47.0%) and tibias (376, 40.2%). A total of 126 (13.5%) patients suffered neurological deficits (NDs), 127 (13.6%) patients sustained associated injuries (ASOIs), and 78 (8.3%) patients sustained complications. During all periods the occurrence increased with increasing age group and a male preponderance was observed in all age groups. With increasing age, the proportion of injuries due to different etiologies increased and the proportion of femur fracture decreased from 65.2% to 34.5%. With increasing year of admission, the proportion of injuries due to MVCs decreased. The most common fracture sites were tibias in MVCs, femurs in low fall, high fall, and struck by object, feet in sprain. Male patients presented with significantly higher proportions of injuries due to struck by object and sprain, significantly lower proportions of pelvis fracture than the female patients. MVCs and tibias were the most common etiologies and fracture sites. Prevention and treatment should be taken according to the pattern of TLLFs which have specific annual, gender, and age characteristics.